DG • 8.919-011.0 • Rev. 04/19
13
PRESSURE WASHER Troubleshooting Guide
TROUBLESHOOTING
PROBLEM
POSSIBLE CAUSE
SOLUTION
LOW OPERATING
PRESSURE
Insufficient water supply. Closed
faucet. Inlet hose kinked
Use larger garden hose; clean inlet water
screen. Open faucet.
Clogged inlet hose strainer
Check plumbing system for leaks. Re-tape
leaks with Teflon tape.
Faulty or improperly adjusted
unloader valve
Adjust unloader for proper pressure. Install
repair kit when needed. Contact local dealer.
Worn packing in pump
Contact local dealer.
Machine has been stored in
freezing temperatures
Thaw out machine completely, including
hose, spray gun and wand.
Slow engine RPM
Contact local dealer.
FLUCTUATING
PRESSURE
Worn or dirty pump valves
Contact local dealer.
Nozzle is obstructed
Blow out or remove debris with fine needle.
Pump sucking air, inlet hose
leaking
Check all pump lines and connections.
PRESSURE LOW
AFTER PERIOD OF
NORMAL USE
Nozzle worn
Replace nozzle.
Unloader valve worn
Replace unloader valve.
ENGINE WILL NOT
START OR STOPS
WHILE OPERAT-
ING
Low oil shutdown
Fill engine with oil.
Out of gas
Fill fuel tank.
Water in gasoline
Drain gas tank; fill with clean fuel.
ENGINE IS
OVERLOADED
Nozzle partially blocked
Clean nozzle.
Excessive pressure from high
engine RPM
Adjust engine throttle to lower RPM.
WATER OR OIL
LEAKING FROM
BOTTOM OF PUMP
A small amount of leaking is nor-
mal
If excessive leaking occurs, Contact local
dealer.
PRESENCE OF
WATER
IN PUMP OIL
Water sprayed at machine
Change oil. Direct spray away from ma-
chine.
High humidity in air
Check and change oil twice as often.
Piston packing worn. Oil seal
worn.
Contact local dealer.
